Science Fair: Coffee Watering Causes Mold—Fix the Moisture

Science Fair: Coffee Watering Causes Mold—Fix the Moisture

Marjoram and parsley seeds in Jiffy pellets watered with coffee growing mold at 10 days? Two issues: planting depth and overwatering.

Fixes

1. Plant shallower: Seeds just barely covered.
2. Water once at planting, then NOT again until surface is very dry.
3. Spray mold with Lysol to kill existing fungus.

Why Coffee Isn't the Problem

Mold comes from constant moisture, not coffee. Coffee may even suppress some fungi. The pellets stayed too wet—seeds rotted.

Expert advice from Darlene, houseplant specialist.